//------------------------------------------------------------------------------
// Copyright 2019-2020 H2O.ai
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//------------------------------------------------------------------------------
#include "parallel/api.h"
#include "parallel/job_shutdown.h"
#include "parallel/thread_pool.h"   // thpool
namespace dt {


void Job_Shutdown::ShutdownTask::execute() {
  thpool->assign_job_to_current_thread(nullptr);
}


Job_Shutdown::Job_Shutdown(size_t nnew, Job_Idle* sch)
  : n_threads_to_keep_(nnew? nnew : 1),
    controller_(sch) {}


ThreadTask* Job_Shutdown::get_next_task(size_t thread_index) {
  if (thread_index < n_threads_to_keep_) {
    return nullptr;  // thread goes back to sleep
  }
  controller_->remove_running_thread();
  return &shutdown_task_;
}




}  // namespace dt
